Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
mang luan » tang luan, bang luan, mong luan
hang luan » tang luan, dung luan
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh ((mang luan) OR (hang luan)) dang cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh ((mang luan) OR (hang luan)) dang cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((mang luan) OR (hang luan)) dang cong dan than cau*.